Molding machine



July 20 1926.

J. A. RATHBONE MOLDING MACHINE Filed Oct. 19. 1925 3 Sheets-Sheet 1 5] m'uc "for July 20 1926. I

J. A; RATHBONE MOLDING MACHINE Filed Oct. 19, 1925 3 Sheets- -Sheet 2 July 20 1926. 1,593,034

J. A. RATHBONE MOLDING MACHINE Filed Oct. 19, 1925 3 Sheets-Sheet :3

Jo/w f/fa/ibo 1 Patented July 20, 1926.

UNITED STATES "PATENT or JOHN A. RATHIBONE, DETROIT, MICHIGAN, ASSIGNOR TO 'RATHBONE MAGHINE.

' COMPANY, CLEV'ITILANIJ, OHIO, A CORPORATION OF OHIO.v

MOLDING MACHINE.

Application filed October The invention relates to molding machines of that typeparticularly designed for form ing multiple molds iand'provided with op-" posed patterns respectively above and below a mold flask. To secure aproper print of the" upper pattern, it has been found necessary to impart aflhigh velocity tothe relatively moving parts, which a with certain constructions has been accomplished-by the useof compressed air. Iti's-the object. of the present invention to accomplish this re sult in a slow acting mechanism and to this end the "inventionconsists in' the construction as hereinafter set forth.

In the drawings; Figure 1 is a sectional elevation of the molding machine embodying my invention Figure 2 is an endelevation thereof;

" igure 3 is aplanlview of the trip 11180113,. nism; A

Figure t isa view similar to Figure 1 showing a modifiedconstruction. 1

Figures 5 and 6 are views similar to Figures 1 and2 showing another modifica- 1 tion. 1

As shown in Figure 1 my improved molding' machine comprises a suitable base A, which supports the lower pattern plate B and fiaskC, the latter being provided with a sand frame D mounted thereon. Above the base is the vertically movable ramming head E, which carries the upper pattern plate F and'holds the same in registration with the lower pattern plate by bearings G slidably engageable with guide pins H projecting upward from the base. -Abovethe head E is a cross head I which slidably engages guides J on the bearings G. This head I is provided with a housing K for a spring L, the lower end of which bears against the head and the upper end against an abutment on the housing. A shank M secured to and projecting upward -.-from the head E passes centrally through the spring; L and an aperture in the housingiK, being provided with a notchor bear- .i-ng N for engaging a latch or detent O, whiohin one-position of the'parts holds the spring L under compression. The cross head I is preferably mounted on swinging links. P pivotally secured atPf. to the base and permitting of laterally -moving the heads E and I" out of the way when the 19,1925. Serial 1%., 63,409.

bearings P slidably engaging headed rods Q, which at their upper ends are attached to the cross head I. The lower ends of these rods arepivotally connected to links R conj nected to rock arms R on a rockshaft R operated by a lever handle R 7 I Atthe rear oft-he machine is arrangeda trip mechanism for disengaging thelatch ordetent Q from the notchN of the shank :M. This consists of a vertically arranged rock shaft S journaled in bearings S, S

on the housing K. At the upper end of this rock shaft is a rock arm S 7 Which has a pin S for bearing against the latch O,

which latter is pivoted on the shaft S and is normally held in engagement with the notch N by a spring S The lower end of the rock shaft S has a pin S engageable with a cam S on the bed A, the arrangement be :ing such that in the downward movement or the'head I the cam S actuating the pin S -will trip the latch O, disengaging the same 7 from the notch N. VVith' the construction as described, th

parts being in the position as shown in Fig-' ure 1, the heads E and I are adjacent to each othelythe latch is in engagement with the notch of the shank M and the spring L is under compression. Assuming that the flask C and sand frame D are in positionand filled with loose sand, the operator draws downward upon the lever handle This, through the rock shaft R rock arms-R and links R, will draw downward the rods Q, which in turnwill draw downward theheads I and E. During this movement the engage- -ment of the bearings G'with the pins H will hold the pattern plate F in exact registration with the pattern plate B, sothat the former The downward movement of the head I will also carry'downthe rock shaft S and at a certain point in this movement the pin S engaging the cam S will rock the shaft S, disengaging the latch Ofrom the notch N; This will immediately release the spring L, which will drive the head E downward at greatly accelerated velocity and will thereby produce the proper compactingof the sand about the pattern. The further downward movement of the lever B will continue to depress the head I, while the head E remains stationary, andthis will again compress the spring L and willmove the latchO into" engagement with the notch by i he which will carry and I permitting of the r and the repet tion oi understood that the with the usual means 1 promo.

In the construction shown'in Figure i the movable ramnni 1' read T is arranged be neath a iixed head U and is moved upward by a hydraulically operated piston V. To impart the reqiusi e acceleration tothe ram,

:1 spring is arranged within the piston off? the ram V and the hollov. aulc T teleseopicall engaging on. A latch X normally holds the n ers 'l" and V from relative movement with the spring under compressiom said'lat-zifh having an actuating arm X with a pivoted dog X at the II(- end thereof for engaging" a tixed hook Y. The arrangement is such that when on V: moved upward by hydraulic pressure the hook Y engaging the dog I? on the arm X will release the catch X permitt ng the spring to quickly throw the rain FUllOWll 1 this operation the continued upward movement of the on V will again compress the spring and engage the latch, thereby effecting the final comprcsr iiou on thc'mold and restoring the parts to petition for a succeeding operation.

itli the modified construction saown in Figures 5 and 6 instead of: automatically rcleasing the stored power during the movement of the ramming head this power is released by a manually operable device. Thus, as shownethe spring- I1 is held under compression by a latch men'i ier Y which may be manually released by the operation of a lever Y This enables the operator to releaso'the stored force at my time icsired and when thusreleased the mold l ill be moved quickly upward into enga ement 'ith the upper pattern Vllill I claim as my invention is:

1. In a molding machine, the combinir tion with relatively movable members for respectively holding a pattern and a mold flask, of actuating means for imparting to said members a slow. powerful relative movement, means for storing a portion of the power of said actuating means and means for releasing the stored power to accelerate the relative movement of said members.

In amoldingmachine, the combination with relatively "movable members for "respectiveiy holding a pattern flash, of actuating means for causing said members to approach each other with a slow, powe ful movement means for storing a portion of the power of each movement oi.

id act ating means and means for releasthe stored power to accelerate the rele movement during a portion of the cycle.

-3. in a molding machine the combination with relative movable memb for respectively holding a pattern and a mold flash, ot a member for actuating one of said members towards the other with a slow, powerful movement, resilient means intermediate said actuating member and the member actuated thereby in which force may be stored by a relative movement of said members, means for lockingsaid last and a mold mentioned members in a relative position where'torce is stored in said resilient member and means for releasing said locking means to liberate said stored force and to accelerate the relative movement of the members respectively holding said tlas and pattern.

4-. In a molding machine, the combination with relatively movable members for respectively holding a pattern and a mold flash, of a member for actuating one of said members towards the other -with a slow, powerful movement resiliently yieldable means intermediate said aetuating member and the member actuated thereby in which "force may be stored during the final com- PIQSSlOH'Oit said pattern against-the sand of the flask, means for locking said actuating member and the member actuated thereby to retain s d stored torce during; the retraetion of said fir mentioned members From each other, amlmeans tor releasing said stored 'lorce toiimpart-a quick initial movement between thepattern and "flask in a succeeding cycle.

5. In a molding machine, the'conibination with a member "for simportin a mold 'llasl: and a meu'iber 'for supporting a superposed pattern, oi a member ior actuating one o't said members toward the otherwith a slow, powerlul movement, resiliently yieldable means between said actuating member and the member actuated thereby in which'iio'rce may be stored during" the final compression of said patter again t the sand in the ill; i'neans for 'lockingieaid members retain the storedjforce andmeansro ing said stored force to imparta quick tire movement between the pattern and t 1e sand,

'6. In a molding machine; the combination with relatively movable 'members "for re spectirely "holding a pattern and -a mold flask, ot manually operable means forimparting a.slow,:powerfulmovement to one -.of said members toward the other, means actuated by said manually operated means for storing power, means for retaining and releasing the stored powerto accelerate the relative movement ofsaid pattern and flask.

7. In a molding machine, thecombination with relatively 'movable members for respectively holding a mold flask and a superposed pattern, of manually operable means for imparting a slow, powerful movement to one of said members toward the other, resiliently yieldable means between the said manually operable means and the member actuated thereby in which force may be stored during the final compression of the during the retraction of said members from the other ofthe. first mentioned members and means for releasing said locking means and said stored force to accelerate the rel ative movement of the pattern and mold flask whereby the sand will be compacted against the patternby inertia.

In testimony whereof I aifix my signature;

JOHN A. RATHBONIC. 

